Allow building on boot2qt.

Change-Id: I91ce455ac5e3992e50d13c14f4035f91baad85bf
Reviewed-by: Andras Becsi <andras.becsi@digia.com>

3rdparty @ 0a34bb77

-Subproject commit ec43e18d084a44ed6bb4378f05f5523606316c5a
+Subproject commit 0a34bb77a59122eeed3f5529a527423d45282db3

tools/qmake/mkspecs/features/functions.prf

@@ -3,7 +3,7 @@ defineTest(isPlatformSupported) {
   osx:lessThan(QMAKE_XCODE_VERSION, 5.1): return(false)
 
   linux-g++|win32-msvc2013|macx-clang: return(true)
-  android-g++-b2qt: return(true)
+  boot2qt: return(true)
   return(false)
 }